xVAMS, the xQuant Valuation and Accounting Management System, serves as intermediary system between front, middle and back office. It is designed to facilitate efficient management of capital market business for institution-al clients. Leveraging ETL toolkits developed in xQuant, it helps enrichment of transaction record, clearance journal and instrument information to construct a complete and reliable dataset. Built on the pricing engine and accounting engine of xQuant, the system provides supplementary services to pricing, accounting and journal posting, as well as compliance checking, reconciliation and P&L analysis for trading records, based on pricing models, accounting rules, trading conventions and regulatory requirements, and provides robust support for refined capital market operations.